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Pololu item #:
954
Brand:
Pololu
Status:
Active and Preferred
This light ball caster uses a 3/4″ diameter plastic ball. The height of the assembled kit ranges from 0.9″ to 1.2″, depending on the combination of included spacers used. Included dowel pins can be used to reduce the friction between the ball and the ABS housing, but they are not necessary for operation.
Alternatives available with variations in these parameter(s): ball diameter ball material Select variant…
Compare all products in Pololu Ball Casters.
Pololu ball caster with 3/4" plastic ball. |
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Pololu ball caster with 3/4" plastic ball with included hardware. |
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Pololu ball caster with 3/4" plastic ball with included hardware. |
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This ball caster kit includes a black ABS housing, a 3/4″ diameter plastic ball, three dowel pin rollers, two spacers (1/16″ and 1/8″ thick), and two 7/16″ #2 screws and nuts. The total height of the ball caster, 0.88″, can be increased to about 1.1″ using the included spacers. The two included #2 screws can be used to mount the ball caster to your chassis, or you can use your own #2 or M2 screws if your application requires a different length.
Note that our ball casters are designed for small robots; they are not intended to bear more than a few pounds. With more weight than this, friction between the ball and the housing will generally keep it from rolling well.
For detailed dimensions, see the dimension diagram (159k pdf).
Pololu ball casters with plastic and metal balls. Ball diameter from left to right: 1″, 3/4″, 1/2″, and 3/8″. |
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Pololu ball caster ball diameter |
height with no spacers |
distance between screw holes |
weight with no spacers or screws |
0.40″ | 0.53″ | 0.03 oz | |
0.40″ | 0.53″ | 0.14 oz | |
0.53″ | 0.58″ | 0.07 oz | |
0.53″ | 0.58″ | 0.32 oz | |
0.88″ | 0.24″ | 0.25 oz | |
0.82″ | 0.61″ | 1.05 oz | |
1.10″ | 0.48″ | 0.65 oz | |
1.10″ | 0.48″ | 0.58 oz | |
1.10″ | 0.70″ | 0.36 oz |
Several people here at Pololu made robots to compete in the LVBots dead reckoning competition last week. This post is about the robot I made along...